QUICK RELEASE DEVICE FOR CANVAS PLACEMENT Russian patent published in 2023 - IPC D05B91/00 

FIELD: household products.

SUBSTANCE: device for hand sewing, darning, and embroidery, as well as for visually demonstrating images made on canvas. The effect is achieved due to the fact that a quick-release device for placing the canvas containing a pair of flat frames with magnets mounted in the frames with the possibility of their mutual magnetic attraction and fixation between the frames of the canvas, characterized in that, for mounting magnets symmetrically along the perimeter, through holes are made in the surface of the frames with equal spacing with the possibility of the mentioned holes coinciding with each other when one frame rotates relative to the other in the plane of the frames, the magnets in the mentioned holes are mounted to the entire depth of each of the frames, without protruding beyond their surface. The identical poles of the magnets in each of the frames are made unidirectional with the possibility of mutual attraction of the opposite poles of the magnets in the frames mating with each other, and for bending the edges of the canvas protruding beyond the outer edges of the frames and fixing the folded edges of the canvas to the outer surface of the frame, the device contains flat strips, a shape that repeats a section of the frame, while the slats have through holes symmetrical to the holes in the frames; magnets are mounted in the through holes of the slats to the full depth, without protruding beyond the surface of the slats, the poles of which are made unidirectional with the possibility of mutual attraction with the magnets of the frame when the bar is positioned on a frame with placing the folded edge of the canvas between them and holding the plank on the said frame and the mutual attraction of the planks among themselves.

EFFECT: improved durability of the canvas and the image on it.

18 cl, 7 dwg